Semiconductor integrated circuit

a technology of integrated circuits and semiconductors, applied in the direction of vessel construction, pulse technique, separation process, etc., can solve the problems of small voltage drop occurring in a resistive component of the power line, affecting the delay of the signal, and increasing the load of the design work, so as to reduce the load of layout design, the degree of freedom of arrangement of the power switch cells, and the effect of suppressing the voltage drop of the power due to the power switch cells
US20050200383A1Active Publication Date: 2005-09-15SONY CORP
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
SONY CORP
Publication Date
2005-09-15

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Abstract

A semiconductor integrated circuit able to reduce a load of layout design when arranging switches in a power lines for preventing leakage current and able to reduce the influence of a voltage drop occurring in the switches on a signal delay, wherein a plurality of groups of power lines are arranged in stripe shapes, power is supplied to circuit cells by a plurality of groups of branch lines branching from the groups of power lines, power switch cells arranged in the groups of branch lines turn on or off the supply of power to the circuit cells, the power switch cells are arranged dispersed in the area of arrangement of the circuit cells, and the supply of power by the power switch cells is finely controlled for every relatively small number of circuit cells.
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Description

CROSS REFERENCES TO RELATED APPLICATION

[0001] The present invention contains subject matter related to Japanese Patent Application JP 2004-067489 filed in the Japanese Patent Office on Mar. 10, 2004, the entire contents of which being incorporated herein by reference. BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The present invention relates to a semiconductor integrated circuit, more particularly relates to a semiconductor integrated circuit achieving a reduction of power consumption by using a transistor having a high threshold voltage to cut the supply of power to an unused circuit.

[0004] 2. Backgound Art

[0005] The power supply voltage of semiconductor integrated circuits have fallen year by year along with the reduction of the power consumption and the miniaturization of processing dimensions. When a signal amplitude becomes small due to the reduction of the power supply voltage, the threshold voltage of a transistor becomes high relative to the signal ...

Claims

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